CVE-2024-42358 Loop with Unreachable Exit Condition ('Infinite Loop') in pdfio
Attackers can cause denial of service via infinite loops and memory exhaustion by uploading malicious TTF files to applications using the pdfio library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-42358?
CVE-2024-42358 is a medium-severity denial of service vulnerability in michaelrsweet pdfio, published on 6 Aug 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
PDFio is a simple C library for reading and writing PDF files. There is a denial of service (DOS) vulnerability in the TTF parser. Maliciously crafted TTF files can cause the program to utilize 100% of the Memory and enter an infinite loop. This can also lead to a heap-buffer-overflow vulnerability. An infinite loop occurs in the read_camp function by nGroups value. The ttf.h library is vulnerable. A value called nGroups is extracted from the file, and by changing that value, you can cause the program to utilize 100% of the Memory and enter an infinite loop. If the value of nGroups in the file is small, an infinite loop will not occur. This library, whether used as a standalone binary or as part of another application, is vulnerable to DOS attacks when parsing certain types of files. Automated systems, including web servers that use this code to convert PDF submissions into plaintext, can be DOSed if an attacker uploads a malicious TTF file. This issue has been addressed in release version 1.3.1. All users are advised to upgrade. There are no known workarounds for this vulnerability.
Weakness: CWE-835
Which versions are affected by CVE-2024-42358?
It affects 1 product.
Products include Msweet Pdfio.
How do I fix CVE-2024-42358?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-42358 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-42358 exists.
Sources
Also known as DEBIAN-CVE-2024-42358, GHSA-4hh9-j68x-8353, UBUNTU-CVE-2024-42358.